Drum-type milling machine



April 14, 1925 J, R. JOHNSON DRUM TYPE MILLING MACHINE Filed Oct. 17, 1921 v 5 Sheets-Sheet 1 April 1925" J. R. JOHNSQN DRUM TYPE MILLING MACHINE Filfid 0051. l7, 1921 5 Sheets-Sheet 2 A fil 14, 1925. v 4

J. R. JOHNSON DRUM TYPE MILLING MACHINE Filed Oct. 17,- 1921 s Sheets-Sheet 5 April 1-4, 1925. 1,533,704

J. mHNsoN DRUM TYPE MILLING MACHINE Filed Oct 17, 1921 5 Sheets-Sheet J. R. JOHNSON DRUM TYPE MILLING MACHINE Apmrii 1 1925. ggg ymg Filed Oct. 17, 1921 5 sheets Shea'ia 5 Patented Apr. 14, 1925.

, i UNITEDSTATS PA EN 7 JOHN JOHN$ON, Q ROCKFORD, ILLINOIS, ASSIGNORTG THE INGERSO'LL MILLING M.AGHINE COMPAQIY, 0F ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

DRUM-TYPE MILLING MACHINE.

Application and October 1?, 1921. Serial no, 505,341.

To all whom it may concern:

Be 1t known that l, J one. B. JoHNsoN, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Drum-Type Milling Machines, of which the following is a specification.

This invention relates to metal surfacing machines such as milling machines of the drum type disclosed in my United States Letters Patent No. 1,4:14,812; and the primary object is to generally simplify and im prove machines of this character.

More particularly, I have aimed to pro-- videa one-piece base, side housings and top plate, which gives a rigid and sturdy frame structure and mounting for the rotary work drum and spindles and pro-motes economy in the manufacture of the machine.

Another object is to locate the spindles and driving mechanism in each side l1OUS* ing in a novel manner.

Still another object is to so construct a drum type milling machine as to enable the use of a novel oiling system, providing continuous lubrication of practically all bean ings by a gravity or cascade feed through the side housings.

My invention also contemplates other objects with reference to the frame construe tion, the mounting of the spindles and work drum and the driving mechanism therefor.

Other objects and attendant advantages will be appreciated by those familiar with this art as the invention becomes better understood by reference to the following description when considered in connection with the accompanying drawings, in which:

Figure 1 is a rear elevation of a drum type milling machine embodying my invention;

2 and 3, are vertical sections through the machine taken substantially on the lines 2-2 and 3-3, respectively, of Fig. i;

Fig. 4, is a vertical section taken substantially on the line l-4 of Fig. 3;

Pi g. 5, a ln'n'iaontal section taken on the line 5-5 of Fig. 4;

Fig. 6, is a fragmentary View, partly in elevation and section of the front of the.

machine, not showing the spindles, but illus; trating in dotted lines the oiling system; and

Fig. 7 is a top view of the frame casting shown in Fig. 6, together withthe oil pipes at the top of the frame.

In a drum. type milling or surfacing ma chine, the workpieces are carried in cir chines are intended primarily for heavy duty milling and continuous operation, ex treme rigidity and durability in the construction is required in order to produce the desired class of work.

In the present invention, I have aimed to simplify and generally improvethe design and construction of machines of this character, in part by providing a frame structure; including a base, side housings and top plate preferably of oneflintegral'y piece,'cast to the desired shape; Referring now to the drawings, it will be observed that the one-piece casting is shaped to provide a rectangular base 11, side housings 12 and 13,.

and a top plate-mythese reference charac tiers being general. Each of theseframe portions is of hollow formationand includes partitions or other interior frame structure for'purposes which will-lie presently appar-.

cut. -The frame may also be shaped to pro;

vide integral therewith a drain and chip trough 15 intermediate "the side housings and having overhanging front and rear aprons .lfii' and 1?? respectively, which slope downwardly and inwardlyf The top plate portion of the frame forms a reservoir or a series of reservoirs for both. the lubricant and cuttingcompound. It also serves as a casing for the overhead driving mechanism, and is closed on its top by a cover plate designated generally by 18.

e The rotary work-carrying structure or drum may be of any suitable or preferred construction and in the present instance comprises a cylindrical body 19 located be-v tween the side housings and having reduced trunnion ends 21 journaled in bearings 22 tically disposed while the rear Walls 29 are inclined so as to provhle a restricted top structure. By reason of this construction and of locating the drum close to the rear Wall greater freedom and space for loading and unloading is provided. The workpieces may be secured on the drum structure in any suitable or preferred manner such as by means of a special fixture for each differ ent work-piece, which fixture when associated with the drum becomes as it were, a

part thereof. Consequently' the \vork-carrying means and drum are referred to synonymously herein.

The cutter spindles are built into the side housings and in the present machine a pair of spindles is mounted on each housing for carrying. roughing and finishing cutters. As shown in. Figs. 2 and 3, the roughing and finishing cutter spindles 31 and 32 respectively, are disposed in a vertical plane substantially mid "'ay between the front and rear ails .28 and 29, with the roughing cutter spindle above, and the oth 1)." below the horizontal axis of the drum.' The SPlIN llOF, their mounting and in'nnediatc drive mechanisni may be of any suitable or preferred mnstruction and as shown are typical. of What is disclosed and claimed in in) companion application Scrial'h'iunber 508,340. The spindle construction shown in Fig. l is duplicated in housing 12. Each housing is shaped to pro vide cylini'lrical bearing 33 for each spindle, in which bearing is axially slidablc a sleeve 34 in which. the spindle revolvcs, .l lach spindle sleeve has a rack face 11.? engaged lr v a spur pinion hi adapted to be rotated by a shaft 2 piu'ijccting beyond the iront oi the machine for ceding the l1'i(llc axially. A, worm gear .pliinul. on

'ihc spindl has a hub bearing in an end plate lmliml to the outer wall of ihesidc lion 'lhc spiiulle 321 and its sleeve 34 constitute a unit assembly adapted to be placed in position from either the inner or the outer side of the l'iousino'; Whereas the 'u'ovni gear 25 and the end plate 23$) constitute another unit assembly adapted to be applied h n ihc out.) side 0!? the housing as explained in 1n his! mentioned. a 'iplicalion. in the present case, however, the norm \vlwels h are driven by \rorius l-l. lixcd o or integral with. a vcrt l sha it h journn'ed insuitable lax-wings h) in the housing .l.-= ihr-rcol'. 'lhc shall. l3! may and connected by a silentlink chain 46 directly to the shaft 43.

The spindle driving shaft 42 in the housing 12 is equipped adjacent to its lower end with a loose worm 4:7 meshing with a worm gear 48, which in turn is connected to the worm gear 24. through the agency of pickolf change speed gears 49 and a. Worm 51.

A suitable clutch is provided including a' shit'table element 52 adapted to be operated by the hand lever 53 for connecting the Worm 47 to the shaft 42. By meansof the lever 53 the drive of the drum is controlled. From the foregoing, it will be manifest that When the motor is in operation the spindles on both housings will be revolved in a clockwise direction viewing Fig. 2; and with the clutch engaged, the drum 19 'will be revolved in a counter-clocluvise direction, it being noted that the drum is driven through the agency of one of the spindle driving shafts.

In ope 'ation, the work-pieces are loaded onto the drum at the rear ofthe machine and are carried in succession between the roughing cutters 54 on);- upper spindles and the finishing'cutte /55 on the lower spindles, and in the prtsent example are removed from the drum as they are carried upwardly at the back of the machine. It should be noted, however, that my in ention is not limited to the means or method of loading and unloadin Attention is now directed to the construcion of the machine with reference to the continuous, gravit oiling system. The top plate portion oi" the frame is shaped as shown plainly in Figs. 6 and T to provide an elongated open trough which serves both as a reservoir and compartment or part of the driving, niechanisn'i. in the present example. the trough is divided transverse partitions inlo reservoirs 5b, 57 and 58. The

"reser'Foii-s 58 and positioned directly above the side housings 12 and 13 respectively, are connected by a pipe 59 and each is adapted for carrying a supply of oil for lubricating various driving elements and lui-z irinejs. The reservoir 57' is utilized for arrvi. ,4 a supply of cutting compound or other solution for the cutters. The oil is delivered lo the reservoirs 56 and 58 from a tank or well (ii in the base, by means of a pump contained in the casing 62 and driven by a shalt (53, the oil delivery being by means of a pipe 64- having a discharge end emptying into the reservoir 56. Each 'side housing is partitioned interiorly to provide oil catch basins 6G and 67 into which the oil cascades or feeds by gravity through plies oil to the basin 70 in which the drum drivin worm 51 islocated. An overflow outlet ll from the basin (39, maintaining the oil at the proper level therein, discharges into a compartment 72 which has a bottom 73 inclined downwardly toward the back of the machine. At the lower end of this incline there is a discharge opening 74 communicating withcompartment 75 which also has an inclined bottom 76, the lower end o t which discharges into the tank 61, Each inclined bottom wall 76 has a series of small dams 7'7. It. will be observed that the oil overflowing from the several basins and the different points of consumption discharges into ,the compartment 72 through the outlet 71 and a pipe 78, the delivery end of the latter being shown in Fig. 6'. This discharging oil'it'alls onto the worm a? at the. front of the machine and drains onto the high end of the bottom 73. It will thus be seen that the. oil having passed through the machine will be carried over the small dams 77, thereby precipitating any foreign matter and also cooling the oil. By utilizing a continuous oiling system of the character disclosed herein which it will be observed is confined within the walls of the frame, all of the moving or operating parts and bearings will be self-lubricated where required,

it being noted that oil holes and grooves are provided so that the various hearings, for example the spindle bearings 80 and the worm gear bearings 79, will be oiled and the surplus will drain back back into the basins. The gears 38 carry the oil to the worms 41. The bearings for the shaft 42 will be lubricated by gravity feed from the top reservoir down through the several bearings. The drum; bearings will be lubricated through suitable Oll passages leading from the oil basin 66. As shown in Fig.3, the oil supply pipe 64. has leads 81 t-o the bearings for the shaft 43 and to a point. above the gears 4%, thus providing constant lubrication for these parts. Sight openings 82 are provided at the front of the machine in front of each worm and in thecover plateat 83 above each spindle driving shaft.- .'-l-hese sight openings are provided at any'xzritrcal point sov that i I 1,533,704 a the attendants may inspect the machine from time to time to see that the oil-system is 1 properly.functioning. Each sight opening is closed by a suitable window properly protected as shown. I

Itwill be evident from the foregoing that the frame structure is very efi'ectively-uti- -l. A. drum type milling machine, com

prising, in combination, an integral frame structure including laterally spaced upright hollow column housings joined by abase portion and a hollow top portion and shaped at its top"to provide an interior oilaesei: voir, a rotary work-carrying drum and tool spindles mounted on the housings, mechanism for rotating the drum and spindles.

and means providing a circulation of oil I from said reservoir down through the housings for lubricating said mechanism and parts driven thereby.

2. A drum type metal work machine, comprising, in con'ibination, a rigid frame structure including laterally spaced upright hollow column housings, a rotary work-carrying drum interposed between and mounted on the housings, one of the housings being shaped to provide an upper oil reservoir and to further provide at lower positions spindle mounting supports and an oil retaining basin beneath each support, tool spindles mounted in said supports, mechanism for rotating the drum and spindles including a gear on each spindle adapted to dip in oil in the basin therebelow, means for delivering oil to said reservoir, and means for causing oil to overflow from said reservoir to said basins.

3. In a drum type milling machine having a rotary work-carrying drum and surface milling, tool spindles for surfacing work-pieces carried between them by the drum, an integral frame structure having laterally spaced upright housings on which the drum and spindles are mounted and-being shaped beneath the drum to provide a chip and drain trough intermediate the housings.

4-. A drum type metal surfacing machine comprising an integral base, side housings and a trough shaped top joining the side l'iousings, a rotary drum carried by and between said housings, cutter spindles on the housings, a cover for said top, and the mechanism in the top having driving connection with the drum and spindles, said trough being adapted to contain lubricant for the cutter spindles and said mechanism.

5. A drum type milling machine, comprising, in combination, a frame structure including laterally spaced upright housings. a work-carrying drum interposed between and mounted on the housings, vertically npaced surface milling tool spindles mounted on one of the housings, mechanism for re; tating the drum and spindles including la driving train extending vcrticall through said housing and connected by gearing to said spindles, a gear fixed to the drum, and a driving train from the lower end of said vertical driving train tenninating in a pin ion located below and in mesh with the drum .gear.

6. drum type continuous milling machine, comprising, in combination. latcrall spaced upright housings. a rotary workcarrying drum interposed betwccu lhc supported on the housings, surface milling tool spindles on each housing for surlaciug workpieces carried between them by the drum. a vertical spindle-driving shaft on cach housing connected by gcaring to the spindles. mechanism for driving said shafts, and a drum-driving worm on the lower cud of one of said shafts coimcctco by gearing to the drum.

7. A drum type continuous milling machine, comprising, in combination. laterally spaced upright. housings. a rotary workcarrying drum interposed between and supported on the housings, surface n'iilling tool spindles on each housing for surfacing workpieces carricd bclwccn thcm by the drum. a vertical spindlc-driving shaft on each housing connected by gcaring to the spindles. mechanism for driving said shal'ts. and a driving train between the lower cud o l onc 0i said shafts and thc drum in luding a clutch, change-speed gearing, a gcar fixed to the drum. and a piniougcar bclow and in mesh with the drum gear and driven by said change-speed gearin 8. A. drum type metal working nun-hints. comprising. in combination. a frame structure having laterally spaced upright hollow column housings joined at the bottom by a compartment for the passage of lubricant to an oil wcll. a rotary work-carrying drum .and tool spindles mounted on the housings, mechanism for rotating" the drum and spindles. an oil reservoir at the top of said frame structure. and means providing for circulation of oil down through the housings for lubricating said mechanism and causing the oil to'fiow through said bottom compart ment to said oil well.

0. A machine as set. forth in cla n S, in

chine. a base. upright hollow column sidc housings thereon. a rotary work drum carried by and between the housings. cutter spindles mounted on the housings. mechaiiis n il'or revolving the drum and spindles, oil catch basins within the housings for supplying oil to said driving mechanism, and means for replenishingthe oil basins.

i2. 111 a drum type metal surfacing machinc. an integral base. side housi il' and a topplale forming a onc-piccc lramc. a rotar drum and utter spindles carriczl by and between the housings. mechanism lot rcvolving thc driuu and spindlcs. the lop plalc bciugshapcd to providc an oil rescr voir. and the sidehousings bcing shaped to provide catch basins adapted to receive oil from said reservoir and supplv ll to said me hanism.

iii. In a drum type metal .-urt'ai.-ing ma chine, a base, upright sidc housings th reon, a top plate joinii'ig the upper cnds ol' the housings and carrying an oil rcscrio r. a rotary work drum and cutter spindles carried by the housings. mechanism for revolving the drum and spindlcs. oil catch basins on the housings for supplying oil to said driving nicchanisn'i, and mcans for causing oil to t'ccd'i'rom lhe resi-u'voir to .said basins.

1+. in a drum type metal surfacing machine. an integral base. upright side housings and top plate forming aoue-picce frame. the top plate shaped to provide a plu-v rality ol' coiapartments adapted for housing driving mccl-anism and for reservoir purposes, a rotary work drum and cutter spindles carried by the side housings, driving mechanism in said top compartmrd; for operating revolving parts of the machine. and means for oiling said mechanism andurcvolviug parts with oil supplied from said rcscrvoir compartn'ient.

if. A. drum type milling machine comprising a base, upright side housings thereon, a top structure joining the upper ends of the housings and-forming a. reservoir. a rotary drum and cutter spindles carried by the housings, driving mechanism carried by the top structure, (lliv'llig tgonnections within the housings between said" mechanism drum and spindles. and n'ieans'providing gravit feed of oil through said housings the driving means therefor;

17. A. drum type milling machine coninrising a base u iright side housin s there i. 7 r r;

on, a top structure joining the upper ends of the housings and forming a reservoir, a rotary drum supported by and between the housings, vertically spaced cutter spindles mounted on each housing, means for driving the spindles, a worm gear drive for each spindle, an oil basin in which each worm gear revolves, and means for feeding oil from said reservoir to said oil basin.

18: ll. drum type milling machine COll'lprising a base, upright side housings there on, a. top structure joining the upper ends of the housings and forming a reservoir, a rotary drum supported by and between the housings, vertically spaced cutter spindles mounted on each housing, means for driving the spindles, a worm gear drive for each spindle, an oil basin inwhich each worm gear revolves, means for feeding oil from sai'dreservoir to said oil basins, and a .pre-' cipitating drain from said basins terminating in an oil well in the base.

19. A drum type metal surfaciii machine comprising an integral base, sideh and a, trough shaped top joining housings, a rotary drum carried by' tween said housings, cutter spindles on the housings, a cover for said top, mechanism in the top having driving connections with the spindles and drum, said trough forming an oil reservoir, and means for causing oil to feed from said reservoir for oiling said driving connections and the spindles.

:20. A. drum type milling machine comprising a base, upright side housings thereon. a. trot-1gb shaped top plate joining the upper ends of the side housings, a work um and cut spindles carried by the side szo'usings, mo: in said housings for driving the spinuics. oil catch basins in said housin 's .i' sup dying oil to said driving Siilu trough providing an oil reseri for feeding oil from said trough to mic. .3 ins.

n. a metal surfacing machine of the zt i't' described. a base, upright hollow in, l'tiilifiiIlQ'S on the base, a work .41. by and between the. housings, U accd cutter spindlesmounted in housing, means in each housing for i ng said spindles, each housing being shaped interi-orly to provide oil catch basins associated with said spindle driving means, and means for feeding oil to said basins for oiling said spindles and driving means.

22. A metal surfacing machine of the character described comprising a base, up

right hollow column side housings thereon, a rotary work drum carried by and between the side housings, a plurality of cutter spindles mounted on each housing and adapted for carrying a cutter at the inner side there' of, each housing being partitioned interiorly to provide oil basin compartn'ients adapted for supplying oil to the spindles and their driving means, and spindle driving means passing through said compartments.

23.1w drum type milling machine comprising a base, upright side housings thereon, a top plate structure joining the upper ends of said housings and providing an oil reservoir, a. rotary work drum carried by and between the housings,- a cutter spindle mounted on each housing and adapted for rarrying a cutter at the inner side thereof, driving mechanism supported on said top structure, a driving train between said mechanism and the spindles, and means for oiling said driving train by gravity feed from oil in said reservoir.

24. A. drum type milling machine con1- prising a base, upright side housings rigidly mounted on the base, a top plate structure rigidly uniting the upper end of the side housings, a cover plate on said top plate, the top plate and cover providing an oil reservoir and a casing for driving mechanism, a work eruin interposed between the "side housingsand re'volubly mountedthereon, cutter spindles moun ted on the side housings, a motor mounted on the cover plate, and motor driven mechanism disposed in said top casing and connected with the drum and cutter spin-dies for revolving the same.

25. A drum type milling machine comprising abase, uprightside housing thereon, a. top structure joining the upper ends of the side housings and forming an oil reset-- voir, a rotary work-carrying drum intcu' posed between and supported on the side himsings, cutter spindles on one of said side ln'iusings, mechanism for revolving the work drum and spindles, and means providing gravity feed of oil through said side housings from said reservoir to the spindiedriving i'nechanism.

26. In a drum type milling machine, the combination of spaced upright side housings, a rotary work drum carried by and between the side housings, a cutter spindle on one of the side housings for milling Work on the drum, means for driving-the spindle and drum, the spindle-carrying side housing being shaped to provide an oil basin 'lor lubricating the spindle-driving means, anev means for feeding oil to said basin.

27. In a drum type milling machine, the combination of spaced upright side housings, a rotary work drum carried'by and between the side housings, upper and lower cutter suindles mounted on each side housing, means for driving said spindles and drum, each side housing being shaped to provide an oil catch basin associated with the driving means for each spindle, and means for feeding oil to the upper basins from which it OWZI'fiOWS to the lower basins.

28. In a drum type milling machine, the combination of spaced upright side housings, a rotary work drum carried by and between the side housings, a cutter -spindle on each side housing for milling work on the drum, means for driving the work drum including a gear on the drum and a driving pinion located beneath the drum, means for driving the spindles, and means for lubricating thespindle-driving means and for causing the lubricant to overflow for lubii eating said drum-driving means. 3

- 29. In adrum type milling machine, spaced side housings, a rotary work-carrying (lI'llll supported upon and between the side housings, cutter spindles mounted in hearings in each side housing for milling work on the drum, and spindle-driving means in each housing, each housing hemp shaped interiorly to provide oil catch basins for lubricating the spindle-driving means therein.

30. In a drum type milling machine. the combination of a frame structure including laterally spaced upright housings, and a rotary work-carrying drum and. surface milling tool spindles mounted on said housings, the base portion of said trame struc ture being shaped to provide a chip trough intermediate the housings.

31. A. drum typeinilling machine set forth in claim 30, in which the chip trough has a larger throat at the front than at the rear of the machine to provide for removal of chips.

In a drumtypemilling machine, the combination of a frame structure including laterally spaced upright housings, and a rotary work-carrying drum and surface millmg tool spindles mounted on said housim c the base portion of the frame structure having a sunken top intermediate the housings providing a chip trough and permittmg lo cation of the drum relatively close to the base.

JOHN R. Jornrsoa. 

